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Tree growth-climate relationships in a forest-plot network on Mediterranean mountains
Nikolaos M Fyllas1, Anastasia Christopoulou1, Alexandros Galanidis2
1Department of Ecology and Systematics, Faculty of Biology, National and Kapodistrian University of Athens, Athens, Greece.
The Science of the Total Environment
|April 28, 2017
Summary
Summer water availability significantly impacts Greek forest tree growth, with species efficient in water use showing greater responsiveness to precipitation. Reduced summer rainfall due to climate change may hinder future tree growth.
Area of Science:
- Ecology
- Climate Science
- Forestry
Background:
- Tree growth is influenced by climate, particularly water availability.
- Mediterranean mountain ecosystems face changing precipitation patterns.
Purpose of the Study:
- To investigate tree growth-climate relationships in Greek mountain forests.
- To identify key climate drivers of tree growth for various species.
Main Methods:
- Analysis of annual ring-width data from 344 tree cores across 20 sites in Greece.
- Studied 7 tree species (Abies cephalonica, Abies borisii-regis, Picea abies, Pinus nigra, Pinus sylvestris, Fagus sylvatica, Quercus frainetto).
- Correlated tree growth with climate variables, focusing on temperature and precipitation.
Main Results:
- Summer water availability (May-August precipitation) strongly predicted interannual tree growth for all species.
- Annual tree growth showed a positive relationship with summer precipitation (PSP).
- Species' water use efficiency (WUE) influenced their growth response to PSP, with more efficient species being more sensitive.
Conclusions:
- Water availability is crucial for mountainous Mediterranean tree species' growth.
- Climate change-induced reductions in precipitation are likely to negatively impact future tree growth in these regions.
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